Concrete-mixer.



J. MIOHELS.

CONCRETE MIXER.

. APPLICATION FILED JULY 8, 1913. 1,09 1,749. Patented Mar. 31, 191 1 2SHEETS-SHEET 1.

Inventor Attorn eys J. MICHELS.

CONCRETE MIXER.

APPLICATION FILED JULY s, 1913.

1,091,749. Patented Mar. 31, 1914.

2 SHEETS-SHEET 2.

lesses Inventor by W M Attorneys JOHN MICHELS, 0E AURORA, ILLINOIS.

CONCRETE-MIXER.

Specification of Letters Patent.

Patented Mar. 31, 1914..

Application filed July 8, 1913. Serial No. 777,917.

To all whom it may concern Be it known that I, JOHN MIoHELs, a citizenof the United States, residing at Aurora, in the county of Kane andState of Illinois, have invented a new and useful Concrete- Mixer, ofwhich the following is a specification.

The present invention relates to improve ments in concrete mixers, oneobject of the invention being the provision of a mixer, the trough andmixing members of which are independently mounted, the trough beingresiliently supported, so that should any of the granular substances ofthe concrete tend to retard or jam the action of the mixing members, thetrough will yield to such action, and prevent the breakage of the mixingmechanism.

A further object of the present invention, is the provision of aconcrete mixer, in which the granular substance and the cement areproperly mixed in proportion in a primary mixing compartment and aredelivered into an intermediate mixing compartment where the ingredientsare sprayed with the necessary amount of water, a final compartmentreceiving such mixed ingredients and more intimately commingling themass and finally delivering the same through the outlet of the machine,thus providing a continuous mixing mechanism that thoroughly comminglesthe ingredients and insures, when the same is delivered through theoutlet end, a proper proportioning of the same as to the cement,granular material and water.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within thescope of what is claimed without departing from the spirit of theinvention.

In the drawingsFigure 1 is a side elevation of the complete mixer takenfrom the power side thereof. Fig. 2 is a top plan view thereof. Fig. 3is a section taken on line 33 of Fig. 2. Fig. 1 is a section taken online 4% of Fig. 3.

Referring to the drawings, the numeral 1 designates the platform orframe of the mixer, which as shown is mounted upon wheels 2 so that thesame may be moved from place to place. In the present instance, the sameis shown as a mechanism to be drawn, but it is evident that the same maybe operated by power, which power when the device is stationary will bethe prime mover for the conveying mechanism.

Two pairs of vertical standards 3 are mounted upon the platform or frame1 and are bridged by the respective transverse angle plates 4., thatconstitute a support for the vertical angle irons 7, there being four ofthe same which in turn properly support the journals, as will presentlyappear for the mixing and conveying mechanism. Two plates 5 are providedand are disposed in vertical alinement with the respective angle plates4- and to each of the plates 5 are connected the two bolts 6, which aremounted for vertical sliding movement through the respective angleplates 4. A spring 8 surrounds each bolt 6, and forms a resilientsupport for the plates 5 which in turn, support the mixing and conveyingtrough 9 of the present mechanism. The terminals 5 of the plates 5, asclearly shown in Fig. 4, are disposed to fit within the vertical angleplates 7 and be guided therein, such plates 7 also limiting the outwardmovement of the plates 5 so that they are maintained in the properposition relatively to the main carrying frame of the machine.

The bottom of the trough 9 is provided with the solid portion 10, and itis provided with the respective transversely disposed receiving andmixing compartments 11, 11 and 11", as particularly shown in Fig. 8.

Carried at the forward end of the trough 9 is a vertical partition wall12, which has secured to its forward end, the granular material carryinghopper 13 and the cement carrying and delivering hopper 14. The outletends of these hoppers are disposed to deliver their respective materialsinto the forward end of the mixing compartment 11.

In order to properly supply the necessary amount of water during theconveying and mixing of the materials in the present concrete mixer, thetransversely disposed water supplying pipe 15 is mounted transverselyacross the upper edge of the trough 9 and directly above the partitionportion between the compartments 11 and 11 so that the water is sprayedthrough the apertures 16 upon the material as the same is delivered fromthe compartment 11 into the compartment 11*. A manually controlled valve17 is provided. in the pipe 15, so that the water may be supplied in thedesired proportion.

Bridging the rear end of the hopper or casing 9, is a plate 18, whichwith the outlet end of the compartment 11 provides the outlet 19 for thedelivery of the mixed concrete from the rear end of the machine to anymechanism or receptacle that may be found expedient to be used with thepresent device.

Formed in the respective long walls 9 of the trough 9 approximatelyabove the centers of the respective compartments 11, 11 and 11*, are theelongated apertures or slots 20, for the reception of the respectiveshafts 21, there being three in the present instance, which are properlyjournaled in the journals- 22 carried by the longitudinal angle beams 22disposed upon the upper ends of the vertical plates 7. By this means,the shafts 21 are maintained in the proper relative position at alltimes while the trough 9 is permitted the necessary vertical move mentdue to the resiliency of the springs 8, and as will presently appear.Keyed upon each of the respective shafts 21 between the Walls 9' of thetrough, are two blades 21*, which are disposed at quartering positionsrelatively to each other, and which are disposed to be rotated in thedirection of the arrows Fig. 3, so that the ingredients will be fedcontinuously from one end to the other.

Keyed upon the respective shafts 21 are the sprocket wheels 23, whichare actuated simultaneously by means of the sprocket chain 24 whichreceives motion from the sprocket 25 disposed upon the drive shaft 26.This shaft 26 as before described may be operated from any form ofmotor, so that all of the shafts 21 and their respective mixing paddles21 are operated simultaneously. In order to produce the necessarytightening of the chain 24;, the adjustable idlers 27 are provided.

In order to properly seal the elongated apertures 20 of the walls 9,there are disposed upon the respective shafts 21 within the hopper thedisks 27, which being carried by the shafts 21 fit over such slots 20and thus as the trough 9 moves up and down due to the resiliency of thesprings 8, will properly seal such slots and prevent the passagetherethrough of the mixed concrete.

From the foregoing description, taken inconnection with the drawings, itis evident that the first series of paddles 21 disposed in thecompartment 11, will receive the ingredients in the dry state, and thatthe same will properly commingle such ingredients, and finally deliverthe same over the partition between the compartment 11 and thecompartment 11 into the compartment 11, such ingredients receiving thewater from the pipe 15 during its passage over such partition so thatthe Water supplied thereto and while the same is within the compartment11" will be sufiicient to produce the necessary consistency in theconcrete while the same is being mixed in the compartment 11 and finallydelivered to the last compartment 11 It is also evident that bydisposing the paddles 21, as herein shown, that a continuous movement isimparted to the commingled mass so that it will be finally deliveredthrough the outlet 19 .after having been properly mixed. It is alsoevident that the sprockets 23 may be of varying'sizes, so that theshafts 21 will be operated at different speeds.

As the granular material often carries large stones, when gravel orcrushed stone is used, there may be a tendency of some to be jammedbetween the ends of the paddles 21 and the adjacent portion of itsrespective to the compartments may be supported by p the frame of themachine.

What is claimed is:

1. A mixing machine, including a supporting frame having a plurality ofupstanding angle plates, a mixing trough disposed is between the platesfor vertical movement, and two resiliently supported plates attached tothe bottom of the trough and having their ends in sliding engagementwith the angle plates of the frame.

2. A mixing machine, including a supporting frame having a plurality ofupstanding angle plates, a mixing trough disposed between the plates forvertical movement, two resiliently supported plates attached to thebottom of the trough and having their ends in sliding engagement withthe angle plates of the frame, two angle beams connected fixedly to theupper ends of the angle plates and upon opposite sides of the trough,and a plurality of mixing paddle carrying shafts journaled upon thebeams and extending transversely of the trough.

3. A mixing machine, including a supporting frame having a plurality ofvertically disposed angle plates, a mixing trough provided with aplurality of transversely disposed compartments mounted between theplates, two transversely disposed plates connected tothe bottom of thetrough and having their ends seated for sliding engagement springsdisposed between the frame and the under side of the transverselydisposed plates for resiliently supporting the trough, and a pluralityof paddles one to each compartment of the trough disposed in the trough.

41. A mixing machine, including a supporting frame having a plurality ofvertically dis osed angle plates, a mixing trough provide with aplurality of transversely disposed compartment-s mounted between theplates, two transversely disposed plates connected to the bottom of thetrough and having their ends seated for sliding engagement between theangle plates, a plurality of springs disposed between the frame and theunder side of the transversely disposed plates for resilientlysupporting the trough, the

walls of the trough being provided with alined pairs of elongated slots,one pair to each compartment, a shaft journaled exteriorly of the troughone to each alined pair of slots of the trough, a paddle keyed upon eachshaft one to each compartment of the trough, the shaft and the paddlesremaining in fixed relation to each other while the trough is permittedvertical movement due to the resilient support thereof.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

JOHN MICHELS.

WVitnesses ULMER KLEIN, W. H. ZILLY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Istents, Washington, D. 0."

